Agilent Technologies DSO-X 4022A, Руководство пользователя

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Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide 83
To specify channel input impedance
1 Press the desired channel key.
2 In the Channel Menu, press Imped (impedance); then, select either:
•
50 Ohm
— matches 50 ohm cables commonly used in making high
frequency measurements, and 50 ohm active probes.
When 50 Ohm input impedance is selected, it is displayed with the
channel information on- screen.
When AC coupling is selected (see "To specify channel coupling" on
page 82) or excessive voltage is applied to the input, the oscilloscope
automatically switches to
1M Ohm mode to prevent possible damage.
• 1M Ohm
— is for use with many passive probes and for
general- purpose measurements. The higher impedance minimizes the
loading effect of the oscilloscope on the device under test.
This impedance matching gives you the most accurate measurements
because reflections are minimized along the signal path.
See Also
• For more information on probing, visit:
"www.agilent.com/find/scope_probes"
• Information about selecting a probe can be found in document number
" Agilent Oscilloscope Probes and Accessories Selection Guide (part
number 5989- 6162EN)", available at "www.agilent.com" .
To specify bandwidth limiting
1 Press the desired channel key.
2 In the Channel Menu, press the BW Limit softkey to enable or disable
bandwidth limiting.
N O T E
When you connect an AutoProbe, self-sensing probe, or a compatible InfiniiMax probe, the
oscilloscope automatically configures the analog input channels to the correct impedance.